linux-kernel - Re: [PATCH] RDMA/rxe: Fix race condition in QP timer handlers

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Message-ID: <02afa3a2-42d1-48c2-a75e-0555e8803d65@fujitsu.com>
Date: Tue, 27 Jan 2026 09:27:27 +0000
From: "Zhijian Li (Fujitsu)" <lizhijian@...itsu.com>
To: Leon Romanovsky <leon@...nel.org>
CC: "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"zyjzyj2000@...il.com" <zyjzyj2000@...il.com>, "jgg@...pe.ca" <jgg@...pe.ca>
Subject: Re: [PATCH] RDMA/rxe: Fix race condition in QP timer handlers



On 25/01/2026 22:08, Leon Romanovsky wrote:
>> Ensure the QP's reference count is maintained and its validity is checked
>> within the timer callbacks by adding calls to rxe_get(qp) and corresponding
>> rxe_put(qp) after use.
>>
>> Signed-off-by: Li Zhijian<lizhijian@...itsu.com>
> Fixes line?

I believe the following `Fixes` tag is appropriate, as this commit introduced
the WARN_ON that now triggers:
  
Fixes: d94671632572 ("RDMA/rxe: Rewrite rxe_task.c")
  
However, I'm not entirely certain if this race condition also existed
before this commit, as it involved a significant rewrite.

Thanks
Zhijian

> 
> Thanks